Beluga is a relatively common group of whales, they belong to the cetaceans in the organisms, specifically, belongs to the suborder of toothed whales. Whales are mammals, so belugas are mammals. Compared with terrestrial mammals, beluga whales live in the ocean and their living environment is very different, so many people will think that beluga whales are not mammals. In fact, as a marine mammal, belugas have many characteristics in common with terrestrial mammals.
One of the most obvious features is the way of reproduction. Like most mammals, belugas reproduce viviparously. Moreover, the gestation period of beluga whales is relatively long, longer than that of human beings, basically about 14 months. Moreover, after reproduction, belugas also have a lactation period, usually between 1.5 and 2 years, which clearly shows that they belong to mammals. In addition, there is a distinct feature in the respiratory organs, belugas breathe with lungs, and need to regularly put their heads out of the water to breathe, which is also unique to most mammals.
The beluga whale lives in the ocean, and its living environment is the same as that of many fish. Moreover, in terms of shape and appearance characteristics, the beluga whale is similar to the fish in many places. Therefore, many people will think that the belugas are fish. However, as mentioned above, belugas belong to mammals, so they can not belong to fish, because mammals and fish are two kinds of animals that do not intersect and are very different.
As a mammal, the beluga whale has many different characteristics from fish. For example, the method of reproduction mentioned above, the method of reproduction used by fish is oviparous, beluga is viviparous; Another example is respiratory organs, fish use gills, while belugas use lungs.
